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Which of the following statements about the %INCLUDE statement is correct?

  It can be used to insert the contents of an external file into a program.

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  It causes a macro definition that is stored in an external file to be compiled when the contents of that file are inserted into a program and submitted.

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  It can be specified with the SOURCE2 option in order to write to the SAS log the contents of the external file that is inserted into a program.

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  All of the above.

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